I expect that having a Tesco Clubcard is no worse than browsing HUKD in terms of knowing stuff about us.
Except you have to pay for a costco card. Supermarket loyalty cards are really data gathering tools so they can market products and services at you more effectively. It doesn't bother me but I can see how some people wouldn't want one.
you realise a clubcard is available to anyone that wants, no different to needing a card for costco deals....
Good spot @imran.mahmood 8)
Where is the discrimination? I don't know anyone that's applied for a Clubcard and been refused. Would you say that a buy 1, get 1 half price deal is also discrimination because you can only get the half price item if you buy the full price one?